gavone1976
New Member
My dodge d150 starts whining when i get to about 20 mph then stops when i get below 20 mph.It sounds like it is coming from right in front of me in the engine.Any thoughts on this?
Whining
- Thread starter gavone1976
- Start date
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TrailBeast
AKA Mopars4us on Youtube
First thought to mind is wheel bearing.
bbrroowwnn
never re member
first thought speedometer
gavone1976
New Member
the speedometer does not work, the needle just jumps around
bbrroowwnn
never re member
that could be the whining when it jumps around....grease cable
Low on power steering fluid?
Alternator,vacuum leak. Year?
Engine?
Trans?
Engine?
Trans?
gavone1976
New Member
1987 slant 6 automatic
Kernel Sanders
eating chicken wings and drinking beer
I had a similar issue with an alternator on my slant. Alternator worked perfectly but stupid whine drove me crazy until switched out
nm9stheham
Well-Known Member
Alternator bearing whines tends to be higher pitched; power steering whines tend to be more of a growling whine, and are louder when you turn the wheel back and forth. Low PS fluid can cause that. Water pump bearings can occasionally whine; easy to find by shaking the fan an seeing if there is any looseness.
Do this OP: Go at about 25 mph with light throttle, so it up shifts to 3rd and check the whine's pitch, then manually put it in 2nd gear at that speed and listen to the pitch of the whine. If it stays the same pitch when the gear goes to 2nd, then it is in the wheels or rear axle. If the pitch goes up with engine RPM with the downshift, then it is on the engine.
And for sure your speedo cable is a problem. You detach the cable from behind the speedomoter and pull the core up and out and lube it with a special moly speedo cable lube; white lithium grease can be used in a pinch but is not as good. When you reinstall the core, both square ends of the core have to engage at the speedo and trannie; sometimes you have to pull of the trannie end, and tug the core out a bit and make sure it goes properly into the square hole in the speedo gear. Sometimes this fixes the jumping speedo, but once I had to just replace the whole speedo and dash pod' the problem was inside the speedo itself.
Do this OP: Go at about 25 mph with light throttle, so it up shifts to 3rd and check the whine's pitch, then manually put it in 2nd gear at that speed and listen to the pitch of the whine. If it stays the same pitch when the gear goes to 2nd, then it is in the wheels or rear axle. If the pitch goes up with engine RPM with the downshift, then it is on the engine.
And for sure your speedo cable is a problem. You detach the cable from behind the speedomoter and pull the core up and out and lube it with a special moly speedo cable lube; white lithium grease can be used in a pinch but is not as good. When you reinstall the core, both square ends of the core have to engage at the speedo and trannie; sometimes you have to pull of the trannie end, and tug the core out a bit and make sure it goes properly into the square hole in the speedo gear. Sometimes this fixes the jumping speedo, but once I had to just replace the whole speedo and dash pod' the problem was inside the speedo itself.
Is it speed generated or rpm generated. If it is speed (20mph) I agree with the speed-o-meter cable.
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